Sum multiplies at SI (or SI is a fraction of it): time to reach another multiple

1. A.
   20
2. B.
   30
3. C.
   25
4. D.
   22

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1. A.
   32
2. B.
   28
3. C.
   16
4. D.
   24

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1. A.
   35 years
2. B.
   25 years
3. C.
   30 years
4. D.
   20 years

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1. A.
   35.5
2. B.
   27.33
3. C.
   42.78
4. D.
   39.67

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1. A.
   $12\frac{2}{3}$ years
2. B.
   $13\frac{1}{3}$ years
3. C.
   $14\frac{2}{3}$ years
4. D.
   $11\frac{1}{3}$ years

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1. A.
   $29\frac{1}{3}$ years
2. B.
   $30\frac{1}{6}$ years
3. C.
   $28\frac{2}{5}$ years
4. D.
   $27\frac{3}{7}$ years

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